A and B are partners with the capital Rs. 1,00,000 and Rs. 80,000 respectively. They share profits and losses equally. C is admitted on bringing Rs. 50,000 as capital only and nothing was bought against goodwill. Goodwill in Balance sheet of Rs. 40,000 is revalued as Rs. 70,000. What will be value of goodwill in the books after the admission of C?